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drm/bridge: synopsys: dw-hdmi: Record hdmi clk previous status

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Compare the status before and after to determine
whether to enable hdmi phy.

Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
Change-Id: Ided938ab83d786d0003afad25a9a191d105d199e
This commit is contained in:
Algea Cao
2021-08-06 09:58:38 +08:00
committed by Tao Huang
parent 7a47817d64
commit d706ee35bb
1 changed files with 16 additions and 7 deletions
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23
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
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@@ -164,9 +164,11 @@ static const u16 csc_coeff_rgb_full_to_rgb_limited[3][4] = {
struct hdmi_vmode {
bool mdataenablepolarity;
unsigned int previous_pixelclock;
unsigned int mpixelclock;
unsigned int mpixelrepetitioninput;
unsigned int mpixelrepetitionoutput;
unsigned int previous_tmdsclock;
unsigned int mtmdsclock;
};
@@ -2068,7 +2070,7 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi,
int hblank, vblank, h_de_hs, v_de_vs, hsync_len, vsync_len;
unsigned int vdisplay, hdisplay;
vmode->previous_pixelclock = vmode->mpixelclock;
vmode->mpixelclock = mode->crtc_clock * 1000;
if (hdmi_bus_fmt_is_yuv420(hdmi->hdmi_data.enc_out_bus_format))
vmode->mpixelclock /= 2;
@@ -2095,6 +2097,7 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi,
vmode->mtmdsclock /= 2;
dev_dbg(hdmi->dev, "final tmdsclock = %d\n", vmode->mtmdsclock);
vmode->previous_tmdsclock = vmode->mtmdsclock;
/* Set up HDMI_FC_INVIDCONF */
inv_val = (hdmi->hdmi_data.hdcp_enable ||
@@ -2423,12 +2426,18 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi,
hdmi_av_composer(hdmi, &connector->display_info, mode);
/* HDMI Initializateion Step B.2 */
ret = hdmi->phy.ops->init(hdmi, hdmi->phy.data,
&connector->display_info,
&hdmi->previous_mode);
if (ret)
return ret;
hdmi->phy.enabled = true;
if (!hdmi->phy.enabled ||
hdmi->hdmi_data.video_mode.previous_pixelclock !=
hdmi->hdmi_data.video_mode.mpixelclock ||
hdmi->hdmi_data.video_mode.previous_tmdsclock !=
hdmi->hdmi_data.video_mode.mtmdsclock) {
ret = hdmi->phy.ops->init(hdmi, hdmi->phy.data,
&connector->display_info,
&hdmi->previous_mode);
if (ret)
return ret;
hdmi->phy.enabled = true;
}
/* HDMI Initialization Step B.3 */
dw_hdmi_enable_video_path(hdmi);